Thermal diffusivity measurement of uranium-thorium-zirconium hydride

B. Tsuchiya, J. Huang, K. Konashi, W. Saiki, T. Onoue, M. Yamawaki

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10 Citations (Scopus)


The uranium-thorium mixed zirconium hydrides of UTh4Zr10Hx (x = 20, 24, 27) have been successfully fabricated without large crack by means of a Sieverts apparatus. The scanning electron microscope (SEM) and X-ray diffraction (XRD) analyses show that UTh4Zr10Hx consist of α-U, ThZr2Hx, and (δ, ε)-ZrHx. The thermal diffusivity measurements of UTh4Zr10Hx have been performed over the temperature ranges to around 773 K by means of a laser-flash method. It is shown that as the hydrogen concentration increases, the thermal diffusivity increases under 600 K and decreases above 600 K. The temperature dependence of the thermal diffusivity can be expressed with the simple equation as functions of composition and temperature. The thermal conductivity of the UTh4Zr10 hydrides has been also evaluated from the measured data of the thermal diffusivity and the density and the estimated data of the specific heat and found to be close to those of U-carbide or -nitride at around 773 K.

Original languageEnglish
Pages (from-to)104-110
Number of pages7
JournalJournal of Alloys and Compounds
Issue number1-2
Publication statusPublished - 2000 Nov 16

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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